NTPC CBT-2 Chemistry Quiz - 48

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Question 1:

Formula of tear gas is-

Question 2:

Which of the following statement is correct?

  1. Acid rain damages agriculture, trees and plants.
  2. Acid rain is due to presence of sulphur dioxide and  carbon dioxide gas in air.
  3. When pH of the rain is less than 6 then it is called acid rain.

Question 3:

Ozone is depleted by

  1. CF2Cl2
  2. CBr2Cl2
  3. CF2Br2
  4. CH2Cl2

Question 4:

In an atomic explosion, enormous energy is released which is due to-

Question 5:

Which compound is called Pearl Ash ?